<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #big{
      width: 100px;height:100px;
      background-color: red;
      margin-left: 30px;
      margin-top: 30px;
      overflow: hidden;
    }
    #big>div{
      width: 50px;height:50px;
      background-color: blue;
      margin-left: 25px;
      margin-top: 25px;
    }
    #hl{
      width: 100px;height:100px;
      border: 3px solid green;
      border-radius: 3px;
      margin-left: 130px;
      padding-top: 60px;
      padding-left: 60px;
      box-sizing: border-box;
    }


  </style>
</head>
<body>
<div id="big">
  <div></div>
</div>
<div id="hl">哈喽</div>
</body>
</html>